;; Exercise 1.2.  Translate the following expression into prefix form
;;  
;;  
;;
;; 5+4+(2-(3-(6+4/5)))
;; -------------------
;; 3(6-2)(2-7)


(/
 (+ 5 4
    (- 2 3
       (+ 6
          (/ 4 5))))
 (* 3
    (- 6 2)
    (- 2 7)))
